Campbell SR11 Page 1 Instruction Manual Download | Manualshive

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INST
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MANUAL

SR11 Pyranometer

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C o p y r i g h t © 2 0 0 6 - 2 0 1 7

C a m p b e l l S c i e n t i f i c , I n c .

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Summary of Contents for SR11

Page 1: ...INSTRUCTION MANUAL SR11 Pyranometer 6 17 C o p y r i g h t 2 0 0 6 2 0 1 7 C a m p b e l l S c i e n t i f i c I n c ...

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Page 3: ...s under guarantee or not Please state the faults as clearly as possible and if the product is out of the guarantee period it should be accompanied by a purchase order Quotations for repairs can be given on request It is the policy of Campbell Scientific to protect the health of its employees and provide a safe working environment in support of this policy a Declaration of Hazardous Material and De...

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Page 5: ...s digital cell phones and aerials may also not be applicable according to your locality Some brackets shields and enclosure options including wiring are not sold as standard items in the European market in some cases alternatives are offered Details of the alternatives will be covered in separate manuals Part numbers prefixed with a symbol are special order parts for use with non EU variants or fo...

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Page 7: ...fore beginning work Wear a hardhat and eye protection and take other appropriate safety precautions while working on or around tripods and towers Do not climb tripods or towers at any time and prohibit climbing by other persons Take reasonable precautions to secure tripod and tower sites from trespassers Use only manufacturer recommended parts materials and tools Utility and Electrical You can be ...

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Page 9: ... Siting Considerations 4 6 2 Mounting 4 6 2 1 Required Tools 4 6 2 2 CM225 Mounting Procedure 5 6 3 Wiring 6 6 4 Programming 7 6 4 1 Input Range 7 6 4 2 Multiplier 8 6 4 3 Offset 8 6 4 4 Output Format Considerations 8 7 Maintenance and Troubleshooting 9 7 1 Maintenance 9 7 1 1 Cleaning Domes 9 7 1 2 Changing the Desiccant 9 7 1 3 Check Sensor Output 10 7 2 Recalibration 10 7 3 Troubleshooting 10 A...

Page 10: ...Table of Contents ii Tables 6 1 Wire Colour Function and Datalogger Connection 7 6 2 Multipliers Required for Flux Density and Total Fluxes 8 CRBasic Example A 1 CR1000 Program Measuring the SR11 A 1 ...

Page 11: ...shipping package to not damage or cut the cable jacket If damage to the cable is suspected contact Campbell Scientific 3 Initial Inspection Upon receipt of the SR11 inspect the packaging and contents for damage File damage claims with the shipping company The model number and cable length are printed on a label at the connection end of the cable Check this information against the shipping document...

Page 12: ...field of view of 180 degrees and the angular characteristics needed to fulfill the cosine response requirements 5 Specifications Features Compatible with the following CRBasic dataloggers CR300 series CR6 CR800 series CR1000 CR3000 CR5000 and CR9000 X Measures reflected solar radiation when inverted Provides measurements in direct sunlight under plant canopies under cloud cover and in artificial l...

Page 13: ...n Sensitivity nominal Expected voltage output Operating temperature range Sensor resistance range Measurement range Cable replacement Spectral range 20 transmission points Levelling Directional response composition nominal at 60 zenith angle Dome diameter FIGURE 5 1 Height FIGURE 5 1 Body diameter FIGURE 5 1 Weight with 5 m cable 0 75 kg 01 65 lb 1Guide to Meteorological Instruments and Methods of...

Page 14: ...ruction with an elevation of 5 over the whole azimuth range of 360 decreases the downward diffuse solar radiation by only 0 8 The sensor should be mounted with the cable pointing towards the nearest magnetic pole For example in the northern hemisphere point the cable toward the North Pole 6 2 Mounting The following mounting procedure is for mounting the sensor horizontally using a CM225 Solar Sens...

Page 15: ...tical pipe onto the sensor 1 Mount the crossarm to the tripod or tower 2 Place the CM225 s U bolt in the bottom holes and secure the CM225 to the crossarm by tightening the U bolt nuts 3 Loosely mount the pyranometer on the mounting stand Do not fully tighten the two mounting screws CAUTION CM225 Stand CM200 Series Crossarm U bolt Nuts CM225 mounting holes used for the SR11 are indicated in orange...

Page 16: ...ightening the set screw 3 7 Route the sensor cable along the underside of the crossarm to the tripod tower and to the instrument enclosure 8 Secure the cable to the crossarm and mast using cable ties 6 3 Wiring A schematic diagram of the SR11 is shown in FIGURE 6 1 White Green Clear FIGURE 6 1 SR11 schematic 1 cable 2 opening for sun screen attachment use hex key to unlock 3 thermal sensor with bl...

Page 17: ...sics are provided in the following section A complete program example can be found in Appendix A Example Program p A 1 Solar radiation can be reported as an average flux density W m 2 or daily total flux density MJ m 2 The appropriate multipliers are listed in TABLE 6 2 Programming examples are given for both average and daily total solar radiation The SR11 outputs a low level voltage ranging from...

Page 18: ...ogger voltage measurement instructions give a default output in mV the following equation should be used to calculate the multiplier m to give the readings in W m 2 M 1000 c Other units can be used by adjusting the multiplier as shown in TABLE 6 2 TABLE 6 2 Multipliers Required for Flux Density and Total Fluxes Units Multipliers Output Processing W m 2 M Average MJ m 2 M t 0 000001 Total kJ m 2 M ...

Page 19: ...ed horizontally Cables and cable gland are in good condition 7 1 1 Cleaning Domes Clean the outer dome at regular intervals daily if possible but at least every two weeks Remove any accumulated dust condensation or ice from the dome and pyranometer body using a soft cloth dampened with water or alcohol 7 1 2 Changing the Desiccant A desiccant filled drying cartridge prevents dew from forming on th...

Page 20: ...o 50 in the first hours after sunrise 7 2 Recalibration The calibration of the pyranometer may drift with time and exposure to radiation Recalibration every two years is recommended The sensor should be returned to Campbell Scientific for recalibration see Assistance page 7 3 Troubleshooting Symptom NAN 9999 or radiation values around 0 1 Check that the sensor is wired to the differential channel ...

Page 21: ...program Please note that each sensor has its own individual calibration factor 2 Visit the installation site and ensure that it is still free from obstructions 3 Check the condition of the sensor cable 4 Ensure that the dome is clean 5 Check sensor mounting verifying that it is still level and at the proper orientation Symptom sensor signal shows unexpected variations 1 Check for the presence of e...

Page 22: ...SR11 Pyranometer 12 ...

Page 23: ...Interval 0 60 Min 10 Average 1 Solar_Wm2 IEEE4 False EndTable Daily Data Table DataTable Table2 True 1 DataInterval 0 1440 Min 10 Totalize 1 Solar_MJ IEEE4 False EndTable Main Program BeginProg Scan 10 Sec 1 0 SR11 Pyranometer measurement in Wm 2 The Multiplier M for this example is based upon a sensor calibration c of 15 02 µV Wm 2 and will be different for each sensor Multiplier M 1000 c 66 5778...

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Page 26: ...Rua Apinagés nbr 2018 Perdizes CEP 01258 00 São Paulo SP BRASIL www campbellsci com br vendas campbellsci com br Campbell Scientific Canada Corp 14532 131 Avenue NW Edmonton AB T5L 4X4 CANADA www campbellsci ca dataloggers campbellsci ca Campbell Scientific Centro Caribe S A 300 N Cementerio Edificio Breller Santo Domingo Heredia 40305 COSTA RICA www campbellsci cc info campbellsci cc Campbell Sci...

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